Alloy of copper



haveinvented certain new and useful Improveparticularly adapted to beused to form the and afterward uniting or welding with this ing metal byflowing it (the backing metal) ing metal in the process of castingconstitutes 3o nickel.

NITED STATES GEORGE F. POTTLE, OF MEDFORD, MASSACHUSETTS.

ALLOY OF COPPER,

NICKEL, AND LEAD.

SPECIFICATION forming part of Letters Patent No. 390,251, dated October2, 188 8.

Application filed July 2, 1887. Serial No. 243.208. (Specimens) To allwhom it may concern:

Be it known that I, GEORGE F. PoTTLE, of Medford, in the county ofMiddlesex and State of Massachusetts,a citizen of the United States,

ments in'Alloys of Copper, Nickel, and Lead, of which the following is aspecification.

My present improvement relates to an improved compound metal or alloywhich is facing or bearing -surfaces of journal-boxes and steam or watergates and the sabots 0f projectiles when these articles are made byiirst castingthe bearing-facein a suitable mold,

bearing-face the rest or backing of the article, which is made ofasuitable cheap metal, pref erably ordinary cast-iron. This latter metalmay be caused to unite or weld with the facinto a suitable mold in whichthe facing-piece has already been placed. The capacity which my improvedalloy or composition metal has of thus being united or joined with thebackoue of its most desirable features.

To form my improved alloy or composition I take six parts, by weight, ofcommercial copper to onepart, by weight, of commercial These may bemelted together in any suitable manner; but I prefer to firstnielt thenickel in a crucible, and then to add the desired amount of copper, theheat of the molten nickel being sufficient to fuse and unite the two. Tothe molten copper and nickel I add one-half a pound of commercial lead,this being added when the mass of copper and nickel has cooledsufficiently not to volatilize the lead.

I do not claim to be the first to form a composition metal in whichcopper, nickel, and lead enter as ingredients. The novelty of my presentinvention and its value for the uses hereinbefore set forth lie in thepeculiar qualities and advantages found in a metal containing theingredients in substantially the proportions stated, which compositionor combination of ingredients I believe to be new with myself, as wellas particularly adapted for the purposes set forth.

While the proportions given above are pre cisely those which I havefound to be adapted to give the best results, I have also discoveredthat a slight variation in the proportions may be made without affectingthe quality of the alloy, as set forth.

I claim- The herein-described composition or alloy of copper, nickel,and lead, in the proportion of six parts, one part, and one-half apart,by weight, respectively. i

In testimony whereof I have hereunto subscribed my name this th day ofJune, A. D. 1887.

GEORGE F. POTTLE.

\Vitnesses:

J. HENRY TAYLOR, E. B. ToMLINsoN.

